Details
In order to manage the traffic between our backbone routers on Roubaix (rbx-1-6k<>rbx-2-6k<>vss-1-6k<>vss-2-6k<>rbx-99-6k), we are establishing a new routing architecture. Switching to this new architecture would take place tonight starting from midnight.
This maintenance concerns the links Roubaix <> Brussels (bru-1-6k).

We are switching the links one by one which would not cause any impact on the traffic.

We will return the links back as before and we will forward the bugs to Cisco ...

Comment by OVH - Saturday, 31 July 2010, 01:50AM

the problem is probably due to MTU which is XXXXX managed on N5
the XXXX to replace by "bad", "differently", etc

Comment by OVH - Saturday, 31 July 2010, 01:52AM

We modified the MTU configuration of the N5 switches and switched the link rbx-1<>rbx-2 above. The BGP session is actually stable. we are going to switch progressively the other links.

Comment by OVH - Saturday, 31 July 2010, 01:53AM

We are switching the links rbx-1<>vss-2 and rbx-2 <> vss-1

Comment by OVH - Saturday, 31 July 2010, 01:57AM

We located some problems on the link rbx-1<>vss-2 before even the start of the switching. We established a fiber temporarily and we expect a maintenance intervention so as to repair it once at all.

We are measuring an abnormal high attenuation on the links vss-2 <> rbx-99 that we would fix.

Comment by OVH - Saturday, 31 July 2010, 02:01AM

Defected links repairing will take place tonight from 23:00. Regarding the way we are improving in this part, we clutch on the switching the routing links on the new internal routing switches.

Comment by OVH - Saturday, 31 July 2010, 02:01AM

We are starting the maintenance.

Comment by OVH - Saturday, 31 July 2010, 02:04AM

Defected links are now repaired. We are beneficing to repair other defected links.

Comment by OVH - Saturday, 31 July 2010, 02:06AM

We reattempted switching the links 10G on the new infra but we are facing always difficulties. We are switching back to the old configuration unless rbx-1 <> rbx-2 which is the only link running correctly via this new infra.

Comment by OVH - Saturday, 31 July 2010, 02:08AM

Tonight, there will be tasks on the network Roubaix2. We are switching the traffic ss-1 <> vss-2 on a new infra nexus. in case of problem, we would return back immediately.

Comment by OVH - Saturday, 31 July 2010, 02:09AM

we are starting the switching operation.

Comment by OVH - Saturday, 31 July 2010, 02:09AM

The traffic is switched.

Comment by OVH - Saturday, 31 July 2010, 02:11AM

It is an MTU problem and a bug.

There is no problem between Nexus 5000 and 6509 standard and/or en SXF.
We are setting the MTU 9216 and that works properly.